SADP(1M) RISC/os Reference Manual SADP(1M)
NAME
sadp - disk access profiler
SYNOPSIS
sadp [ -th ] [ -d device[-drive] ] s [ n ]
DESCRIPTION
sadp reports disk access location and seek distance, in
tabular or histogram form. It samples disk activity once
every second during an interval of s seconds. This is done
repeatedly if n is specified. Cylinder usage and disk dis-
tance are recorded in units of 8 cylinders.
Valid values of device are dkip for the SMD disk controller.
Other disk types, notably the SCSI disks, cannot collect the
information displayed by sadp. drive specifies the disk
drives and it may be:
a drive number in the range supported by device,
two numbers separated by a minus (indicating an
inclusive range),
or
a list of drive numbers separated by commas.
Up to 8 disk drives may be reported. The -d option may be
omitted, if only one device is present.
The -t flag causes the data to be reported in tabular form.
The -h flag produces a histogram on the printer of the data.
Default is -t.
EXAMPLE
The command:
sadp -d dkip-0 900 4
will generate 4 tabular reports, each describing cylinder
usage and seek distance of dkip disk drive 0 during a 15-
minute interval.
FILES
/dev/kmem
Printed 11/19/92 Page 1